some of these things are beginner ,others are mid or advanced. some of those things are considered niche / specialization . in some of the categories you need to know at least one of them (e.g. programming languages) , in others you need to know all of them (e.g. Architectural Patterns ).
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if backend developer has to know all of these technologies, I doubt if any backend developer exists in this world :)
some of these things are beginner ,others are mid or advanced. some of those things are considered niche / specialization . in some of the categories you need to know at least one of them (e.g. programming languages) , in others you need to know all of them (e.g. Architectural Patterns ).